Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for generating a commit graph for a software project maintained in a version control system having a directory-based branching structure. One of the methods includes receiving data representing a commit history of a software project maintained in a version control system having a directory-based branching system in which each branch of the commit history has a respective branch directory and each revision is identified by a branch path and a revision number. The commit history is traced backward in time from a starting commit of a branch to identify an initial commit in which a branch directory for the branch was created. The commit history is then processed forward in time from the initial commit to generate a tree-structured commit graph.